Molding-flask.



PATENTED MAR. a, 1903.

P. J. MGGUIRE, MOLDING PLASK.

APPLICATION FILED JAN. 31, 1902.

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WITNESSES INVENTOR .w-"i-s I BY 'U N ATTORNEY HLQRW WDMW 7m: was; PETER: cc. PHaTu-umo. wAsumc-Tcr. um.

PATENTED MAR. 3, 1903.

P J MCGUIRE MOLDING FLASK. 1 APPLICATION FILED JAN. 31, 1902.

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ORNEY v PATENTED MAR.3,1903.1 P. J. McGUIRE. MOLDING FLASK. APPLICATION FILED JAN. 31, 1902.

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WITNESSES BY ATTORNEY UNI D STATES PATENT OFFICE.

PETE J. MCGUIRE, OF BLAIRs ILLE, PENNsYLvANIA, AssIeNoR TO THE CHAMPION SANITARY ENAMEL WARE 00,, A CORPORATION PENN- SYLVANIA.

MOLDl-NG-FLASK.

SPECIFIGATION forming part of Letters Patent No. 721,726, dated March 3, 1903.

Application filed Januftry 31, 1902. Serial No. 91,951 (No model.)

To all whom it mag concern:

Be it known that I, PETER J. MCGUIRE, a

' citizen of the United States, residing at Blairsville, in the county of Indiana. and State of Pennsylvania, have invented a new and use ful Improvement in Molding-Flasks, of which improvement the fol-lowing is a specification. This invention relates to certain new and useful improvements in molding-flasks, re-

' line X X of Fig. I.

lating particularly to flasks for molding bathtubs. 1

The object of my invention isfirst to provide a flask structure for theabove-mentioned purpose wherein but two flasks are iangployed, thereby considerably lessening the a or. Y r A second'object of my invention is to provide means whereby accurate registration of the two'flasks or mold parts .is made andv maintained when brought together. Other novel features reside in the construction and arrangement of parts as hereinafter set forth. g

' In the accompanying drawings I have illustrated my'improvements in variousways, in'

which' Figure I is a plan viewof the fla'sks as they,

would appear when set up for casting. Fig. II isa side View of the same. Fig. III is an end viewof the same. .Fig. IV is: a transverse sectionalview through the same on the Further reference to said drawings for a detailed description of said views thenumeral 1 designates the drag-flask,consistingof an open framehavi'ng formed thereabout the flanges 2 and 3 and upon the ends thereof the trunnions 4, said trunnions'being pro-1' vided for convenience in handling said flask. Upon the flanges of said flaskare formed the inclined ways or ribs 6 and 7, the upper flange being also provided with vertical pins 5. 1 v The ends and sides of said flask are provided with outwardly-extended guide boxes or receptacles 8, which boxes are provided at their side walls with moderately tight-fitting contact-screws 9. This drag-flask after being rammedup with'sandto form the mold portion 10 is previous to being rolled over fitted With'a bottom board 11, which board is secured theretoby clamps 12, engaging over the inclined waysor ribs 7 of the flask and similar ribs 13 upon the under side of said to one another by clamps 20, said lower flange being also provided with openings ofsuch diameter asto freely engage over the pins 5 of. the drag-flask and permit plenty of play therebetween. To the flange 16 of said copeflask, at the ends and sides thereof, are secured the tapering tongues or guide members 21, which are adapted to go between and engage the screws 9, o fthe receptacles upon the drag-flask when brought together. Frames having flanged ends toengage upon the upper flanged-portion of the cope-flask are pro- 'vid'e'd, the sides of which form the flask-bars 22, 23, and 2lto extend down into said flask or mold therein, said frames being provided with inclined ways or ribsj at their ends,

so that thesamemay be firmly secured to the I flask by clamps'26. In this flask structure the pins 5 upon t-heone flaskf and .the open ings in'the other-t0 engage thereover arenot depended upon to bring about proper fitting of the two when broughtltogether, but they 'do perform the fun'ctionsof auxiliaries to the mainguidesjto more quickly and easily bring aboutthe closure position between the main guides.

The main guides herein referred to arcadmirably adapted for bringing about accurate matching or registration of the two flasks or mold parts when brought together, which is 5 a specialfeature in the manufacture of bathtubs, as the least perceptible play between the guide members will, owing to the thinness of metaland the diiference in angulari'ty and curvature thereof at various points,

result in unequal expansion and contraction and possible loss of said tub. In this structure of guide the one member, 21, being tapered upon its opposite engaging sides and the other member, 8, being provided with adjustable screws to engage the tapered surfaces of said first member when the two flasks or molds are brought together a perfect tight contact between the members is made, and as the flasks are provided at both ends and sides with these guides either longitudinal or lateral displacement of one mold part or flask in relation to the other is effectually prevented. Furthermore, by means of the screws 9 adjustment of one flask or mold part in respect to the other may be made, and the proper position being once determined may be maintained.

Heretofore it has been customary to mold bath-tubs in a three-part flask, the central flask forming the cheek; but in this structure only two flasks are employednamely, cope and drag, with detachable frames forming the bars for the latter flask.

In practice the frames are placed upon and secured to the cope-flask after the latter has been rammed up a sufiicient distance to cover the pattern, the sand forming the remaining portion of the mold being then rammed about said bars.

Bycasting the inclined ribs upon the flasks and the detachable frames the same may easily and quickly be secured together by the clamps and in like manner the bottom board attached.

By the use of the two-part flask structure herein described I am enabled to greatly re-,

duce the labor and cost of manufacturing cast bath-tubs. Furthermore, the tubs cast will be perfectly smooth throughout their entire surface, which is not attainable where a cheek is employed.

Having thus fully shown and described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a plural-part flask adapted for molding bath-tubs, the combination with the member designed to confine the entire mold part for the exterior of the tub thereof of removable sand retainers comprehending two or more cross-bars having outward extensions integral thereat by a cross-piece adapted when the mold has been partly rammed up to be inserted in said flask and suspended therein by direct engagement of said extensions upon the upper opposite edges proper of said flask.

2. In a plural-part flask, the combination therewith of adjustable registering members arranged at the ends and sides of their meeting edges whereby the registering position of one flask member upon the other may be adjustably varied longitudinally by said side members without disturbing those at the ends or laterally by said end members without disturbing those at the sides, and removable internal sand-retainers for the cope member comprehending two or more connecting crossbars having outward extensions adapted to engage upon the upper edges of said cope member and support the bars therein whereby the same may readily be removed to permit that portion of said flask extending below said bars being rammed up.

3. A two-part flask for molding bath-tubs,

comprising a cope and a drag flask member each having integral inclined clamping-strips at their meeting and top and bottom edges, a plurality of integral cross-bars having inclined clamping-strip extensions at their ends to engage upon and register with those at the top of the cope-flask, and registrable adjusting members arranged upon the sides and ends of said flasks at their meeting edges adapted to laterally and longitudinally adjust the position of one flask with the other and when adjusted maintain the same in such position against displacement in either of said directions, said registering members comprehending vertically extended wedge shaped tongues carried by one flask and set-screws carried by the other at like points to engage opposite tapered sides of said tongues.

4. A two-part flask for molding bath-tubs, comprising a cope and a drag flask member each having integral inclined clamping-strips at their meeting and top and bottom edges, a plurality of integral cross-bars having inclined clamping-strip extensions at their ends to engage upon and register with those at the top of the cope-flask, guide-pins projecting from the meeting edge of one flask to enter openings in the other, and registrable adjusting members arranged upon the sides and ends of said flasks at their meeting edges adapted to laterally and longitudinally adjust the position of one flask with the other and when adjusted maintain the same in such position against displacement in either of said directions, said registering members comprehending vertically extended wedge shaped tongues carried by one flask and set-screws carried by the other at like points to engage opposite tapered sides of said tongues.

5. A two-part flask for molding bath-tubs, comprising a cope and a drag flask member each having integral inclined clamping-strips at their meeting and top and bottom edges, a plurality of integral cross-bars having inclined clamping-strip extensions at their ends to engage upon and register with those at the top of the cope-flask, guide-pins projecting from the meeting edge of one flask to enter openings in the other, registrable adjusting members arranged upon the sides and ends of said flasks at their meeting edges adapted to laterally and longitudinally adjust the position of one flask with the other and when adjusted maintain the same in such position against displacement in either of said directions,abottom board carrying inclined clamping-strips to register with those at the bottom edge of the drag-flask, and clamps having their jaws inclined to correspond with and engage the clamp-strips at the top bottom and In testimony whereof I have hereunto meeting edges of said parts, said adjusting signed my name in the presence of two sub members comprehending vertically-extended. scribing Witnesses.

wedge-shaped tongues carried by one flask PETER J. MCGUIRE. and set-screws carried by the other at like In presence of points to en gage opposite tapered sides of said CHAS. KERLER, J r.,

tongues. RICHARD S. HARRISON. 

